ازالة ملوحة مياه البحر عمليات المعالجة ما بعد

اعتمادا على التطبيق المياه المعالجة، الماء الخارج من نظام التحلية يجب ان يكون مهيئة قبل الاستخدام.

الماء المحلى يجب ان يكون ذو درجة حامضية مائلة الى الحامض PH بعد المرحلو الاولى و والمواد الصلبة الذائبة من 70-350 ملغم / لتر، 2-6 ملغم / لتر من الكالسيوم + المغنيسيوم والبورون تركيز بين 0،5-1،2 ملغم / لتر على أساس ملوحة المياه الخام و درجة الحرارة.

تقنيات المعالجة الما بعد يتغير لاختلاف التطبيقات النهائية:

مياه الشرب

Therefore 2nd-pass Ro permeate should be remineralized to achieve a residual typical hardness of 8oD (100 mg/L CaCO3).

This solution matches well drinking water requirements in low sodium, high calcium values.

مياه الري

Irrigation water is more complex, it relies on an equilibrium between sodium, calcium and magnesium that ensure good infiltration in the soil. this equilibrium is measured by the Sodium Adsoprtion ratio (SAR) and the Electrical conductivity (EC):

Boron should also be removed, as it represents a toxic poison for the plants.
In order to keep a minimum EC of 0.3 dS/cm (~200 mg/L TDS), a sufficient calcium and magnesium concentration, the second-pass RO should be avoided or largely by-passed. Therefore the ideal solution is to use a specific Boron removal ion exchange resin and then to remineralize.

Process water

Process water is a very generic term that includes all type of water that doesn't need to comply with the WHO guidelines for drinking water. Requirements are usually up to the water consuming apparatus manufacturers guidelines, like a heat exchanger, a boiler, dilution water, etc.. In heating/cooling industries, process water should usually have a low mineralization to avoid scale deposit in the pipes or chloride corrosion.

For further demineralization visit our Desalination Polishing Step pages

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